| Project/Area Number |
25420059
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Production engineering/Processing studies
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| Research Institution | Akita Prefectural University |
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Principal Investigator |
WU YONGBO 秋田県立大学, システム科学技術学部, 教授 (10302176)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIMOTO MASAKAZU 青山学院大学, 理工学部, 助教 (00581290)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 機械工作 / 生産工学 / 研削 / 超音波 / サファイア / LED / 機械工作・生産工学 |
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| Outline of Final Research Achievements |
A spiral ultrasonic assisted grinding technique was proposed and an experiment setup was constructed. Then, scratching tests and grinding experiments of sapphire material were performed followed by fractal analysison work-surface formation. The results showed that with ultrasonication (1) the critical depth of cut increases by around 30% and the grinding force decreases by more than 30%; (2)with the resin-bond diamond wheel the grain cutting edge becomes small and its number increases, whilst with the vitrified-bond wheel good working surface is maintained and the wheel wear is reduced followed by the improvement in work-surface quality; (3)the fractal analysis demonstrated that the surface roughness and the material removal mode can be characterized by fractal dimension.
In addition, for the practical use of the proposed technique, a new ultrasonic unit with the vacuum mechanism for fixing the workpiece was successfully produced and its performance was confirmed.
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